Nut-lock.



W. G. QUA'RLES 62 C. H. STURGILL.

NUT LOCK.

APPLICAHONJILED NEZI. I918. 1,28%310 Pmmd Dec. 10, 1918.

FATE

WILLIAE/I G. QUARLES AND CHARLIE H. S'IURGILL, OF EAST CHATTANQOGA, TENNESSEE,

nor-Loan.

I Specification of Letters Patent.

Patented Dec, 1@, 1918.,

Application filed June 21, 1917, Serial No. 176,184. Renewed .Tune 21, 1918, Serial No. 241,296.

To all whom it may concern:

Be it known that we, lVILLIAZlI G. QUARLEs and CHARLIE H. S'rUneILL, citizens of the United States, residing at East Chattanoog'a, in the county of Hamilton, State of Tennessee, have invented certain new and useful- Improvements in Nut-Locks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in nut locks.

One object of the present invention is to improve the construction of devices of this character wherein the locking member is positively held from removal or accidental displacementfthus rendering the nut immovable with respect to the bolt in either direction.

Another object is to provide a device of this character which is simple in construction, easy to assemble and which can be manufactured at a comparatively low cost.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation of our improved nut locking device shown in connection with a nut and bolt.

Fig. 2 is a vertical longitudinal sectional view taken centrally through the nut and bolt.

Fig. 3 is a vertical transverse sectional view taken on the line 33 of Fig. 1.

Fig. 4 is a sectional view similar to Fig. 2 showing a modified form Fig. 5 is a vertical sectional view taken on the line 55 of Fig. 4.

leferring to the accompanying drawing", and particularly to 1, 2, and 3, represents bolt having the threaded portion 11 on which is engaged the nut l2. l1 ormed through two of the opposite side faces of the nut, and communicating with the central bore of the nut, are the openings 13, said openings beingin axial alineuient, as shown. A headless metal pin 14 having a point 15 is disposed through either or the openings 13 and then the same driven into the threaded portion of the bolt until the outer end of the bin lies below the face of by drilling clear through the nut, and across It will be noted" the central'threaded bore. that the openings are formed on a generally tapering line, so that when the pin 19 is driven into the opening- 17 the inner end of the pin will be allowed a space in which to expand, by reason of the fact that the inner end of the said opening is wider than the outer portion. In this form the ex panding oi the inner end of the pin serves to prevent the outward movement of the pin, after having been properly driven into the bolt.

Thus there has been provided a simple and etiective device whereby a nut can be positively locked against turning on the bolt, in either direction.

If desired, the face of the nut, surrounding the opening 17, may be upset in the same manner as the face is treated in the first form, thereby providing a second means for preventing the removal of the pin.

Attention is called to the fact that the invention is'capable of ready application of bolts and nuts now'in use by simply boring the holes 13.01 18 and 17 through the nut. Thus the ordinary nut is readily converted into a device For use in connection with the present invention, and without any appreciable increase in the cost of the manufacture of the nut. employed the manufacture of nuts need not be interfered with.

Whatis claimed is:

In a nut lock device, a bolt, a nut engaged on the bolt. the nut havingopenings forms transversely therethrough and intersecting l urthermore, the method now fn-l the central opening of We nut, said openings being in axial aiineinent and tapering in the outward direction, and a pointed pin (lisposecl through one of said openings and penetrating into the bolt, the inner end of the pin being upset into the inner wider portion of the opening.

In testimon; whereof, we affix our signzr 'hn-es in The presence of two witnesses.

\VILLIAM G. QUARLES CHARLIE H. STURGILL. Witnesses A. O. MOORE, IRENE MOORE. 

